Circuit board module



FIG. 1 is a perspective view of a circuit board module showing my new design;

FIG. 2 is a front view of a circuit board module;

FIG. 3 is a left view of a circuit board module;

FIG. 4 is a right view of a circuit board module; and,

FIG. 5 is a top view of a circuit board module. 

The ornamental design for a circuit board module, as shown and described. 